ColorShuffle.osl

// Adrian Cruceru
// Redshift Rendering Technologies 2020
// channel shuffler
// This file is licensed under Apache 2.0 license

shader ColorShuffle
[[ string help = "Shuffles Channels",
   string label = "Shuffle Channels",
   string category = "Color" ]]
(
    color  inColor = color(0,0,0)
        [[  string label="Input" ]],
    int inR = 0
        [[  string label= "Red Channel",
            string widget = "mapper",
            string options = "Red:0|Green:1|Blue:2" ]],
    float redScale = 1
            [[  string label = "Red Scale",
                    float min = 0,
                    float max = 1]],
    int inG = 1
        [[  string label= "Green Channel",
            string widget = "mapper",
            string options = "Red:0|Green:1|Blue:2" ]],
    float greenScale = 1
            [[  string label = "Green Scale",
                    float min = 0,
                    float max = 1]],
    int inB = 2
        [[  string label= "Blue Channel",
            string widget = "mapper",
            string options = "Red:0|Green:1|Blue:2" ]],
    float blueScale = 1
            [[  string label = "Blue Scale",
                    float min = 0,
                    float max = 1]],
    output float outRed = 1
            [[  string label = "Red Output"]],
    output float outGreen = 1
            [[  string label = "Green Output"]],
    output float outBlue = 1
            [[  string label = "Blue Output"]],
    output color outColor = 1
            [[  string label = "Out Color"]]
)
{
    outRed   = inColor[inR]*redScale;
    outGreen = inColor[inG]*greenScale;
    outBlue  = inColor[inB]*blueScale;
    outColor = color(outRed,outGreen,outBlue);
}